Retail SKU check

Client

Retail SKU check searches sometimes confuse internal stock-keeping units with GS1 GTINs. Paste barcode digits here for mod-10—alphanumeric SKUs need different validation rules.

SKU vs GTIN workflow

Map each listing row: GTIN column gets mod-10 validation here; SKU column stays in your PIM—do not expect checksum on arbitrary SKU strings.

Privacy: every comparison runs locally in your tab. Toolcore performs no GS1 registry lookup, product database match, or price scan—checksum math only.
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GTIN‑8, UPC‑A (GTIN‑12), EAN‑13, and logistic GTIN‑14 all end with the same ISO/IEC GS1 modulus‑10 weight‑3 algorithm used by the barcode generator when it pads shortened bodies with a check digit. Alternate lengths map to retailer packaging standards (coupon GTIN‑12, carton GTIN‑14, compact GTIN‑8).

Result

Passes modulus‑10 GS1 rule for GTIN-13 (13 digits).

Common use cases

  • Audit marketplace feeds where SKU and GTIN columns were swapped.
  • Explain to sellers why internal SKU cannot replace GTIN on listings.

Common mistakes to avoid

  • Treating retailer-assigned SKU as GTIN

    SKUs are retailer-specific; GTINs are globally unique product identifiers with mod-10.

FAQ

Can I check a SKU here?

Only if it is a numeric GTIN-length barcode—internal alphanumeric SKUs are out of scope.

Common search terms

Phrases people search for that match this tool. See the full long-tail keyword index.

  • gtin checksum verifier online
  • ean 13 check digit validate browser
  • upc-a modulus 10 checker locally
  • gtin 14 logistic barcode checksum
  • gs1 digit string validator no lookup

More tools

Related utilities you can open in another tab—mostly client-side.